Grate for furnaces



(No Model.)

T. KIRKWOO'D.

GRATE FOR FURNACES. No. 390,376. Patented Oct. 2, 1888.

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a J2 J2 AT -{i INVENTOR .Mi/Mi 4 MW yaw/M UNITED STATES PATENT @EEIQE.

THOMAS KIRKW'OOD, OF CHICAGO, ILLINOIS.

GRATE FOR FURNACES.

SPECIFICATION forming part of Letters-Patent No. 390,376, dated October2, 1888.

Application filed May 14, 1886. Serial No. 202,190.

To all whom it may concern.-

Be it known that I, THOMAS KIRKWOOD, a citizen of the United States,residing at Ohicago, Illinois, have invented certain new and usefulImprovements in Grates for Furnaces, of which the following is aspecification.

In the drawings, Figure 1 is a plan view of my grate. Fig. 2 is a planview of one of the fiuger-bars with a number of gratefingers on the barready to be pushed up into place. Fig. 3 is a vertical section takenlongitudinally of the grate-bar at one of the end sections, show ing themeans of connecting the finger bar with the end sections.

In the drawings, A represents the fingers of the grate; B, thelinger-bar; C, the frame or side pieces supporting the finger-bars; D,the trunnions at the ends of the finger'bar, and E, the rocking bar.

In making my improved grate, I take a suit able frame of cast or otherproper iron and of the size of the furnace into which the grate is to beplaced. I provide along the sides of this gratet'rame bearings,preferably inclined, into which thetrunnions supporting the finger-barsrest and move when in position and while being rocked. I make thesefinger-bars preferably of wrought-iron and of alength suitable to reachfrom side to side of the grate-frai'ne. The grate-fingers are made insections, so that they can be placed in position on the finger-bar oneat a time and slid up against each other This enables me to remove anyinto position.

(No model.)

particular section of the grate-fingers should it become warped or wornout in use and re place it with new ones. The end section of thegrate-fingers is preferably provided with a socket or bearing, intowhich the ends of the finger-bars are inserted, as shown in Figs. 2 and3. This socket should be of asquare form or. such other shape that thefinger bars would be rigidly attached to the end sections of thegrate-fingers when in place, so that such end sections and finger-barswould rock together. a size to support two grate-fingers, as shown inFig. 2 of the drawings. I also provide them with trunnions D to fit intothe bearings on the side of the grate-frame. Asall these features willbe apparent from an inspection of the drawings, I do not consider thatthey need be described with greater minuteness of detail.

I preferably make the end sections of 5 Vhat I regard as new, and desireto secure

